263801806427 has 2 divisors, whose sum is σ = 263801806428. Its totient is φ = 263801806426.

The previous prime is 263801806399. The next prime is 263801806451. The reversal of 263801806427 is 724608108362.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-263801806427 is a prime.

It is not a weakly prime, because it can be changed into another prime (263801806327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131900903213 + 131900903214.

It is an arithmetic number, because the mean of its divisors is an integer number (131900903214).

Almost surely, 2^263801806427 is an apocalyptic number.

263801806427 is a deficient number, since it is larger than the sum of its proper divisors (1).

263801806427 is an equidigital number, since it uses as much as digits as its factorization.

263801806427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 774144, while the sum is 47.

The spelling of 263801806427 in words is "two hundred sixty-three billion, eight hundred one million, eight hundred six thousand, four hundred twenty-seven".